Wrench



(No Model.)

J. P.` FORSBERG.

' WRENCH. No. 592,285. Patented Olot. 26,1897.

5mm/woz L; ama/neng.

Nirnn STATES JOHN P. FORSBERG, OF TI-IIEF RIVER FALLS, MINNESOTA.

WRENCH.

SPECIFICATION-forming part of Letters Patent No. 592,285, dated October26, 1897. Application filed April 20, 1897. Serial No. 632,908. (Nomodel.)

To a/ZZ whom t may concern:

Be it known that I, JOHN P. FoRsBERG, a citizen of the United States,residing at Thief River Falls, in the State of Minnesota, have inventedcertain new and useful Improvements in Vrenches; and I dovhereby-declare the followingr to be a full, clear, and exactdescription of the invention, such as will enable others skilled in theart to which it appertains to make and use the same.

The object of my invention is to provide a simple and effective nutwrench which is adapted to be used upon nuts of any size or shape and inany out-of-the-way position.

The invention consists of a bar constituting a stationary jaw and partof the handle, having a slot extending therethrough at a point adjacentto its forward end and parallel laterally-eXtending lugs at its eXtremerear end, a movable jaw having teeth upon one edge thereof-aud formedwith a laterally-extending arm which iits within said slot and ispivoted to the stationary jaw, a bar constituting the operating-leverfor the lmovable jaw and a part of the handle of the wrench formed withvbifurcated forward ends, within which the movable jaw ts and ispivoted, and a nut having a central threaded opening therethrough,within which the threaded rear end of said operating-lever fits, saidnut fitting between the lugs at the rear end of the stationary jaw.

In the drawings forming part of this speciication, Figure l represents aperspective View of my improved wrench, parts being shown in dottedlines to more clearly bring out the construction. Fig. 2 is a detailview of the bar constituting the stationary jaw and a part of thehandle. Fig. 3 is a similarview of the movable jaw, and Fig. 4 is asimilar View of the operating-lever for the movable aw. J Likereference-numerals indicate likeparts in the different views.

My improved Wrench is made up of a bar 1, constituting a stationary jawand a part of the handle, said bar being provided with alaterally-extendin g slot or openin g 2 at a point near its forward endand with two parallel laterally-extendin g lugs 3 3 at its extreme rearend. The movable jaw 4 is provided with teeth 5 upon its inner engagingsurface and has a laterally-projecting arm or extension 5 thereon whichis slightly narrowerthan the main part of said jaw. Said extension 5a tswithin the slot or opening 2 and is pivoted to the bar l', as shown at6. The bar 7 constitutes the operating-rodffor the movable jaw 4 and apart of the handle of the wrench. It is formed with bifurcated forwardends 8, between which the narrow portion of the movable jaw 4 fits andis pivoted. rPhe rear end of said rod is screw-threaded and is adaptedto extend through openings 9 9 in the lugs 3 3. Fitting between saidlugs is a nutlO, havinga milled outer surface and a centralscrewthreaded opening, within which the rear end of the bar 7 iits.

In using my wrench it is merely necessary, in order to separate themovable jaw from the stationary jaw, to turn the nut 10 in one directionor the other, according to the way in which thev screw-threads areformed, which 'action will retract the bar 7, drawing with it themovable jaw 4. A reverse operation from that just described will closethe jaws of the wrench and cause the same to grip upon the nut or otherobject to be turned thereby.

By reason of the fact that the operating-rod 7 of the movable jawextends to the extreme rear end of the bar l the same is adapted toserve as a part of the handle of the wrench. The two parts 1 and 6, whengrasped, therefore, to operate the wrench to turn a nut7 will be heldpositively and certainly against slipping or any movement whateverrelative one to the other.

Having thus described the invention, what is claimed as new, and desiredto be secured by Letters Patent, is-

A wrench comprising a bar constituting a stationary jaw and a part ofthe handle, provided with a laterally-extending slot or opening thereinand having a pair of laterally-extending parallel lugs at its extremerear end which are formed with alined openings, a movable jaw having acontracted laterally-projecting arm or extension thereon which iitswithin said slot and is Vpivoted to the bar in which said slot isformed, an operating rod or bar for said movable jaw having bifurcatedIOO forward ends between which the contracted portion of said movablejaw iits and to which said movable jaw is pivoted, and having a screwthreaded rear end which projects through the :dined openings in saidings, and In testimony whereof:` I have signed this :L nut fittingbetween said lugs formed with :L specification in the presence of twosubscribcentral threaded aperture within which the ing witnesses.

rear end of said operating-bar fits, the said JOHN P. FORSBERG.operating rod or bar serving :ts zr part of the Vitnesses:

handle of said wrench, substantially as and J. V. SWANSTROM,

for the purpose described. L. J. BARNES.

